US3247888A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically heated film evaporator
Assignee: BASF SE
•
Filing: 1963-06-25
•
Granted: 1966-04-26
•
Expires: 1983-06-25
Abstract
No abstract record available.
Inventors
- 👤 Mueller Heinrich
- 👤 Honsberg Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:19
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/10; F24H1/101; F24H1/102; F24H1/105; B; B01; B01D; B01D1/00; B01D1/0011; B01D1/0017; B01D1/06; B01D1/065; B01D1/30; C; C01; C01D; C01D1/00; C01D1/04; C01D1/42; H; H05; H05B; H05B3/00; H05B3/0014; Y; Y10; Y10S; Y10S159/00; Y10S159/01; Y10S159/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
AN ELECTRICALLY HEATED FILM EVAPORATOR FOR DEHYDRATING CAUSTIC ALKALI SOLUTIONS COMPRISING: A SUBSTANTIALLY VERTICAL EVAPORATOR TUBE, SAID EVAPORATOR TUBE BEING CONNECTED IN AN ELECTRICAL CIRCUIT AS AN ELECTRICAL RESISTANCE; MEANS TO UNIFORMLY DISTRIBUTE THE SOLUTION TO BE DEHYDRATED ON THE INNER WALL SURFACE OF SAID TUBE INCLUDING (A) A FEED LINE FOR SUPPLYING THE SOLUTION AT AN ANGLE TO THE AXIS OF SAID TUBE TO IMPINGE ON THE INNER WALL OF SAID TUBE IN THE NEIGHBORHOOD OF THE UPPER END OF SAID TUBE AND (B) A ROUGHENED PORTION ON THE INNER WALL OF SAID TUBE EXTENDING OVER A SHORT AXIAL DISTANCE WITHIN SAID TUBE BENEATH AND IMMEDIATELY DOWNSTREAM FROM SAID FEED LINE; AND MEANS FOR SUPPLYING ELECTRIC CURRENT TO SAID EVAPORATOR TUBE.
Claim 2
Dependent Claim
122 words
AN ELECTRICALLY HEATED FILM EVAPORATOR FOR DEHYDRATING CAUSTIC ALKALI SOLUTIONS COMPRISING: A SUBSTANTIALLY VERTICAL EVAPORATOR TUBE, SAID EVAPORATOR TUBE BEING CONNECTED IN AN ELECTRICAL CIRCUIT AS AN ELECTRICAL RESISTANCE; MEANS TO UNIFORMLY DISTRIBUTE THE SOLUTION TO BE DEHYDRATED ON THE INNER WALL SURFACE OF SAID TUBE INCLUDING (A) A FEED LINE FOR SUPPLYING THE SOLUTION AT AN ANGLE TO THE AXIS OF SAID TUBE TO IMPINGE ON THE INNER WALL OF SAID TUBE IN THE NEIGHBORHOOD OF THE UPPER END OF SAID TUBE AND (B) A ROUGHENED PORTION ON THE INNER WALL OF SAID TUBE EXTENDING OVER A SHORT AXIAL DISTANCE WITHIN SAID TUBE BENEATH AND IMMEDIATELY DOWNSTREAM FROM SAID FEED LINE; AND MEANS FOR SUPPLYING ELECTRIC CURRENT TO SAID EVAPORATOR TUBE.
References Cited (Backward Citations)
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US1932406A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |